Motor-actuated shovel.



M. J. ZABAWA. MOTOR ACTUATED SHOVEL.

APPLICATION FILED APR. 9. I917. 1,271.648. Patented July 9,1918.

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M. J. ZABAWA.

MOTOR ACTUATED SHOVEL.

APPLICATION FILED APR. 9, 1917.

1 271 648. Patented July 9,1918.

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MOTOR ACTUATED SHOVEL.

APPLICATION FILED APR 9.19M.

Patented July 9, 1918.

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'rrnn snares MICHAEL J'. ZABAWA, F GRAND RAPIDS, WISCONSIN.

MOTOR-ACTUA'IED SHOVEL.

Specification of Letters Patent.

Patented July 9, 1918.

Application filed April 9, 1917. Serial No. 160,603.

. To all whom it may concern:

Be it known that I, MICHAEL J. ZABAWA, a citizen of the United States, residing at Grand Rapids, county ofWood, and State of WVisconsin, have invented new and useful Improvements in Motor-Actuated Shovels, of which the following is a specification.

My invention relates to improvements in motor actuated shovels. The object of my invention is to provide means whereby the shovel may be more effectively operated in a machine of that type in which the shovel is connected with a swinging boom by a lever adapted to slide upon its connection with the boom, whereby the scoop may be manipulated in proximity to the lower end of the boom, or extended, when in a raised position, preparatory to dumping the same.

In the drawings I Figure 1 is a side'elevation of shovel operating mechanism, embodying my invention.

Fig. 2 is a rear elevation of the same.

Fig. 3 is a front elevation,

Fig. 4 is a detail view of the latch supporting brace and latch, showing the scoop operating lever in section, on line 44 of Fig.1.

Fig. 5 is a side elevation showing the scoop as it appears when filled and extended preparatory to the dumping operation.

Fig. 6 is a similar view showing the scoop as it appears after the dumping operation and while still extended.

Like parts are identified by the same reference characters throughout the several views.

The boom 1 is pivotally connected at 2 to the upper rotary member 3 of a'turn table having a relatively stationary member 4. The scoop 7 is pivotally connected to a scoop operatinglever 8, adapted to slide through a fulcrum bracket 9 pivoted to the boom at 10. The bracket 9 is provided with anti-friction rollers 11 and 12, adapted to bear upon the front and rear surfaces of the lever 8. The lever is manipulated longitudinally through this bracket 9 by means of a drum 15 mounted on the lower end portion of the boom 1, and having operating cables 16 and 17 secured to and adapted to wind upon the drum 15, and connected with the scoop operating lever 8 by eye bolts 18 and 19 respectively. The cables extend around pulleys 20 and 21 respectively, also supported from the boom 1 above the drum 15. The shaft 25, upon which the drum 15 is mounted, is extended at one end and provided with a pulley 26 adapted to receive an operating belt or chain 27, whereby the drum may be actuated from any suitable source of power. By rotating the drum 15 in one direction the cable 16 may be wound upon the drum, and cable 17 simultaneously unwound to actuate lever 8 in a direction to extend the scoop 7. By actuating drum 15 in the opposite direction scoop 7 may be retracted in the direction of the boom 1.

The lower end of the lever 8 is provided with a forwardly extending arm 30, the front end of which is also connected with the lever 8 by a brace 31. The arm 30, brace 31 and the lower end portion of lever 8 all form a triangular frame adapted to support a pulley block 33 at a substantial distance from the front of the scoop, and at a short distance above it. The operating cable 35 extends over pulleys 36 journaled at the upper outer end of the boom 1, and around the pulleys 37 connected with pulley block 33, the end of the cable being secured to the pulley block at 38. The arrangement of the cable and the pulleys is well known, and requires no further description. But, by locating the pulley block 33 ata substantial distance in advance of the scoop 7 I am enabled to manipulate the scoop more effectively and with greater powerthan in the constructions heretofore used, in which the pulley block, corresponding with pulley block 33, has been connected directly with the lower end of the scoop supporting lever.

To hold the scoop in filling position, I employ a lever'40 which is rigidly secured to the scoop, and which holds the scoop in proper filling position when its upper end is engaged by latch 41. Latch 41 is pivoted to the brace 31 at 42, and operates between thebrace and a segmental guide bracket 43. Latch 41 is provided with a slot 45 in which the upper end of lever 40 is adapted to engage, whereby the lever is locked in osition by the latch. The lower extremity of t e latch is provided with a curved surface 48, whereby if lever 40 strikes the latch when returning to scoop holding position, the latch will be lifted, and will allow the lever to pass underneath it to position of engagement in slot 45. The scoop may be manipulated by tilting it upon its pivotal connection 50 with lever 8, to adjust it to either its filling or its dumping position by means of a cable 51. One branch 52 of this cable is connected with an arm 53 projecting rearwardly from lever 40. A pull exerted through the branch cable 52 upon the arm 53 tends to draw lever 40 toward lever 8, thereby swinging the lower end of scoop 7 forwardly to the position in which it is illustrated in Fig. 1, in which position latch 41 drops into lock- 10 ing position, i. 0., the position of engagement with the upper end of lever 40.

But it will be observed that the other branch 57 of cable 51 passes around pulley 58'carrieol byv lever 8, and upwardly along lever 8, its extremity being attached to the inner or actuating arm of the latch 41 at 61. By pulling upon this branch 57 of the cable the actuating arm of the latch swings downwardly, thereby lifting the other end of the latch to position of release, and permitting scoop 7 to swing downwardly by gravity. The branch cables 52 and 57 are so proportioned in length that when the scoop is'in the position illustrated in Fig. 1, a pull upon cable 51 will be exerted through the branch '52 to draw lever 40 into position to be engaged by the latch 41. Any pull upon the cable 51 is therefor effective to hold the scoop in filling position, as shown in 1, the cable operating in cooperative relationto the latch. But when the scoop 7 moves forwardly and upwardly, pulley 58 travels in an are which carries it'around in front of the connection between branch cable 52 and arm 53, said point of connection simultaneously swinging downwardly toward branch cable 57, and therefore approaching the junction point at 65 where the branches 52v and 57 are connected with cable 51. Branch cable 52 therefore becomes slack, whereas branch cable 57 tends to become correspondingly taut. This will not cause a release of latch 41, however, unless a pull is exerted upon cable 51. The scoop 7 will be rigidly held by the latch while swinging forwardly and upwardly, and by manipulating the boom 1. and lever 8 in accordance with the common practice followed with machines of this type, the scoop may be filled, elevated and then projected forwardly to any desired extent, the boom 1 being swung laterally as desired, to carry the scoop to a suitable point for delivery. Thereupon, by pulling upon cable 51, power may first be transmitted through branch cable 57 to release the'latch 41, and allow the scoop to swing by gravity to dumping position. A continued pull upon cable 51 will thereafter be exerted through branch 52 to retract lever 40 and readjust the scoop to thegpo'sition illustrated in Fig. 1, the release of the latch having allowed branch cable 57 to become slack. As lever 8 swings inwardly at its lower end and returns to the scoop filling position in which it is illustrated in Fig. 1,

the approach of pulley 58 toward the cable junction point 65 allows the latch to return to locking position, lever 40 being in the meantime held in position to receive the latch by branch cable 52, which remains taut until after the latch has engaged lever 40.

To facilitate the operation of the winding drum 15, I preferably provide drum sup porting shaft 25 with a brake pulley 62, over which a brake band 63. maybe manipulated by lever 64. The connection and operation of this drum, however, is in accordance with ordinary practice, and in itself these parts may be regardedas old and common in the art. The motor for operating the so respective cables has not been illustrated since any operating mechanism may be employed, and the means for operating such cables is well known in theart/ It will, of course, be understood that the motor, and 5 also the mechanism herein described, will ordinarily be supported from a portable vehicle, operated in the us'ual manner. s V

The boom may "be raised .and lowered, and also swung laterally by means of adjustable stays 69, in accordance with the usual practice.

1. In a shovel mechanism, the combination with 'a'boom, of a scoop supportingle'ver having fulcrum bearing support upon" the boom, and adapted to slide in such support, flexible connections for adjusting'said lever in said support, a scoo pivotally supported at the lower end of said lever, in a position to dump by gravity, an operating arm connected with the scoop, a rigid forwardly projectingframe carried by the scoop support-- ing end of the lever,ja latch to hold; the scoop operating arm with the scoop in filling position, flexible connections for actuating the operating arm to latching position and the latch to releasing position, a pulley mounted on the outer end of the boom, and'an operating cable extended over said pulley, and 0011- nected with the front end of the forwardly projecting frame. r Y I v 2. The combination set forth in claim 1, in which the forwardly projecting frame is provided with parallel bars between which the scoop o'erating arm is adapted to' swing, and in w ich a latch is provided between the parallel bars to engage the scoop operating arm, and hold it with the scoop in filling position. I

3. The combination set forth in claim 2, and means for manually actuating the scoop to latch engaging position, and the latch to scoop releasing position. v

4'. The combination set forth in claim 3, in

which the releasing connections comprise a cable having a branch connected with the scoop operating arm, and another branch, connected with the latch, the lower end of the scoop supporting lever being provided with a pulley about which the latch engaging branch of the cable extends.

5. In a shovel mechanism, the combination with a scoop supporting and operating lever, a scoop pivotally secured to the lower end thereof, a scoop setting lever rigidly secured to the scoop, a latch for locking the scoop setting lever with the scoop in filling position, a flexible connection adapted to operate the latch, and another flexible connection for operating the scoop setting lever, said flexible connections being connected in common with an operating cable, and the latch connection being supported from the scoop operating lever at a point below and in front of the attachment of the other flexible connection to the scoop setting lever, whereby when the scoop operating lever is swung forwardly the latch operating connection will become relatively taut, and adapted to transmit motion to the latch in advance of the action of the other connection upon the scoop setting lever.

In testimony whereof I aflix my signature in the presence of two witnesses.

MICHAEL J. ZABAWA.

Witnesses Gno. L. WILLIAMs, BETH LAMBERTON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner 01' Patents, Washington, D. 0. 

